Remove go version check for make fmt (#2558) (#2561)

Makefile

@@ -56,11 +56,8 @@ clean:
 	$(GO) clean -i ./...
 	rm -rf $(EXECUTABLE) $(DIST) $(BINDATA) integrations*.test
 
-required-gofmt-version:
-	@$(GO) version  | grep -q '\(1.7\|1.8\)' || { echo "We require go version 1.7 or 1.8 to format code" >&2 && exit 1; }
-
 .PHONY: fmt
-fmt: required-gofmt-version
+fmt:
 	$(GOFMT) -w $(GOFILES)
 
 .PHONY: vet
@@ -112,7 +109,7 @@ misspell:
 	misspell -w -i unknwon $(GOFILES)
 
 .PHONY: fmt-check
-fmt-check: required-gofmt-version
+fmt-check:
 	# get all go files and run go fmt on them
 	@diff=$$($(GOFMT) -d $(GOFILES)); \
 	if [ -n "$$diff" ]; then \